Multiple Choice

A welder is calculating two complementary angles, x and y, for a custom bracket design. The welder knows that the difference between the two angles is 26 degrees and sets up the following system of equations:

x + y = 90 x - y = 26

When using the elimination method, which characteristic of the variable 'y' should the welder recall as the primary reason that these two equations can be added together immediately to solve for x?

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Updated 2026-04-20

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